Mobile power source



FIG. 1 is a front, top perspective view of the mobile power source;

FIG. 2 is a front, bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

All portions shown in broken lines are environmental and illustrative only and form no part of the claimed design. 

CLAIM The ornamental design for a mobile power source, as shown and described. 